SQL Execution Plan and statistics are displayed in sqlplus.

Sqlplus displays SQL Execution plans and statistical information 31, 32, 33, 34 keywords: oracle storage structure the most detailed explanation: 1: doc 1 logical storage structure 2: doc 2 physical storage structure how to open oracle sqlplus trace: after opening, you can see the statistical information during execution: first log on to the dba: [SQL] drop role plustrace; Role dropped. create role plustrace; Role created .. grant plustrace to dba with admin option; Grant succeeded. then authorize HR; [SQL] GRANT PLUSTRACE TO HR; Grant succeeded. however Log On with the HR User: [SQL] SQL> conn HR/HR is connected. SQL> set auto trace SP2-0158: Unknown SET autocommit option "trace" Usage: set auto [COMMIT] {OFF | ON | IMM [EDIATE] | n} SQL> set autot trace SP2-0618: The session identifier cannot be found. Enable exam PLUSTRACE role SP2-0611: an error was reported when STATISTICS reporting was enabled: The preceding error solution: 1: log on with an oracle dba user 2: execute the following authorization command: [SQL] SQL> conn/as sysdba is connected. SQL> grant select on v _ $ sesstat to plustrace; authorization successful. SQL> grant select on v _ $ statname to plustrace; authorization successful. SQL> grant select on v _ $ mystat to plustrace; authorization successful. SQL> grant plustrace to dba with admin option; authorization successful. SQL> grant plustrace to HR; authorization successful. After the SQL> exit authorization is complete, log on to the oracle common user HR: Open autotrace on to see the execution plan and statistics. [SQL] SQL> conn HR/HR is connected. SQL> select count (*) from employees; COUNT (*) ---------- 107 SQL> set autotrace on SQL> select count (*) from employees; COUNT (*) ---------- 107 execution Plan -------------------------------------------------------- Plan hash value: 3580537945 bytes | Id | Operation | Name | Rows | Cost (% CPU) | Time | ------------------------------------------------------------------------- | 0 | select statement | 1 | 1 (0) | 00:00:01 | 1 | sort aggregate | 1 | 2 | index full scan | EMP_EMAIL_UK | 107 | 1 (0) | 00:00:01 | shard statistical information defaults 0 recursive cballs 0 db block gets 1 consistent gets 0 physical reads 0 redo size 420 bytes sent via SQL * Net to client 416 bytes received via SQL * Net from client 2 SQL * Net roundtrips to/from client 0 sorts (memory) 0 sorts (disk) 1 rows processed